JPH05206720A - Primary radiator in common use for circularly and linearly polarized waves - Google Patents

Abstract

PURPOSE:To obtain the primary radiator in common use for a circularly polarized wave and a linearly polarized wave by operating a rotary composite phase circuit section to an electromagnetic wave of a circularly polarized wave and a linearly polarized wave led to a circularly polarized waveguide, selecting the wave to be received and extracting an output signal. CONSTITUTION:A 1st phase shifter uses a 90 deg. phase shifter comprising metallic lumps 4,5, and the metallic lumps 4,5 are fitted to the phase shifter so that circular-arcs of the upper and lower part on the circular surface in the inside of a torus slider 14 opposite to each other are formed flat. Then the length of the metallic lumps 4,5 along the guide axis direction of the slider 14 is selected to be a length by which a phase difference between two polarized wave components orthogonal to each other in the TE 11 mode of the electromagnetic wave propagated to the inside is 90 deg.. Moreover, a 90 deg. phase shifter comprising a dielectric plate 8 is used as a 2nd phase shifter and the dielectric plate 8 is formed turnable around the guide axis of the circular waveguide 3. Then the length of the dielectric plate 8 along the guide axis direction of the waveguide 3 is selected to be a length by which a phase difference between two polarized wave components orthogonal to each other in the TE 11 mode of the electromagnetic wave propagated to the inside of the waveguide 3 is 90 deg.. The horizontally and the vertically polarized waves are received by turning both the phase shifters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a circularly polarized wave capable of receiving both satellite broadcasting (BS) using circularly polarized wave and communication satellite (CS) using linearly polarized wave. And a linear radiator for both linearly polarized waves.

[0002]

2. Description of the Related Art In a conventional BS and CS shared antenna, a BS primary radiator and a CS primary radiator are mounted side by side on the same reflector, the focus of the same reflector is shifted, and the BS primary radiator is placed at the focal point at one end. The primary radiator for CS is located at the focal point of the other end, the reflector is oriented toward each satellite, and BS radio waves and CS radio waves are received. Therefore, since the reflectors are defocused, the gain obtained by each primary radiator is reduced, and since two primary radiators are attached to the same reflector, the structure becomes complicated. However, as shown in the patent application filed by the applicant on October 8, 1991, the primary radiator for both circular polarization and linear polarization, which can receive both circular polarization and linear polarization. There is. As shown in FIG. 10, this primary radiator for both circularly polarized waves and linearly polarized waves has a circular waveguide 2 having an opening 1 at one end for introducing an electromagnetic wave and a termination surface 9 at the other end.
In FIG. 4, a fixed first phaser (metal blocks 4 and 5 in the figure) and a rotary second phaser (in the figure) are provided between the opening 1 and the end surface 9 inside the circular waveguide 24. , The dielectric plate 8) are arranged side by side, and the electromagnetic wave introduced inside is output to the side surface of the circular waveguide 24 facing the phase shifter (the dielectric plate 8 in the figure) which is the end face 9 side. (In the figure, a rectangular waveguide 6) is provided to receive circularly polarized waves and linearly polarized electromagnetic waves.

[0003]

However, since the first phase shifter is of a fixed type, when circularly polarized waves are received, separate ones for right-handed circular polarization and left-handed circular polarization are prepared. Had to do. The present invention relates to a first rotary type inside a circular waveguide.
By providing a phase shifter and a second phase shifter that is also rotatable, linearly polarized waves (horizontal and vertical) and circularly polarized waves (clockwise,
It is intended to provide a primary radiator for both circularly polarized waves and linearly polarized waves, which can be shared by receiving both the left and the right).

[0004]

FIG. 1 is a partially cutaway perspective view of a primary radiator for both circular polarization and linear polarization, showing an embodiment of the present invention. As shown in FIG. Ultrasonic wave having a circular waveguide 2 provided with an opening 1 capable of introducing the light and a circular slider 2 arranged in proximity to the circular waveguide 2 so that the tube axes thereof are linear. Motor slider 14
A first phase shifter (metal masses 4 and 5 in FIG. 1) may be provided on the inner wall of the electromagnetic wave so that the phase difference between two orthogonal polarization components of the TE11 mode of the electromagnetic wave propagating inside is approximately 90 degrees. The rotatable phase circuit part and the phase circuit part and the tube axis are arranged close to each other so as to form a straight line, and a terminal surface 9 capable of reflecting the introduced electromagnetic wave is provided, and the electromagnetic wave introduced to the side wall. A second phase shifter (in FIG. 1, a dielectric material) in which a rectangular waveguide or a probe (a rectangular waveguide 6 in FIG. 1) is provided as an output means of the The second phase shifter (dielectric plate 8) is provided with the plate 8).
2 of TE11 mode of electromagnetic wave propagating in
It is composed of a circular waveguide 3 capable of making the phase difference between the two polarization components approximately 90 degrees.

[0005]

According to the present invention, the first phase shifter of the rotating type for the circularly polarized (right-handed and left-handed) and linearly-polarized (horizontal and vertical) electromagnetic waves introduced into the circular waveguide 2 is constructed as described above. And a second phase shifter are operated to select a receiving side and take out a signal from the output means to form a shared primary radiator capable of receiving a circularly polarized wave and a linearly polarized wave. However, the principle is as follows. In FIG. 1, the horizontal direction (left direction) from the tube axis of the circular waveguide 2 is the X axis, and the vertical direction (upper direction) from the tube axis of the circular waveguide 2 is the Y axis. The axes directed toward the −X axis (not shown) and the −Y axis (not shown) [hereinafter, FIG.
The same applies to FIGS. 4 to 8 and 10. Broadcast satellites and communication satellites have different geostationary orbits, so the antennas are directed to the respective satellites at the time of reception, so that circularly polarized waves and linearly polarized waves enter the primary radiators for both circularly polarized waves and linearly polarized waves at the same time. It never comes. Therefore, first, the operation when receiving the linearly polarized wave will be described below. 4A to 4D are exploded views of electric field vectors of horizontal polarization and vertical polarization at the input / output ends of the composite phase circuit unit, which are shown in FIG. 4A in the circular waveguide 2. Thus, the horizontally polarized wave Eh is introduced in a direction that bisects the X axis and the Y axis, and as shown in FIG.
It is assumed that the vertically polarized wave Ev is introduced in the dividing direction.

When the introduced horizontal polarization electric field vector is Eh, the electric field vector Eh is X, as shown in FIG.
It can be decomposed into electromagnetic waves having a vector component Ehx in the axial direction and a vector component Ehy in the Y-axis direction, and
If the introduced vertical polarization electric field vector is Ev,
As shown in the figure (B), the vector component Evx in the −X axis direction.
And can be decomposed into an electromagnetic wave having a vector component Evy in the Y-axis direction. Horizontally polarized wave Eh shown in FIG.
When the phase of the Y-axis component of the electric field vector is delayed by 180 degrees with respect to the vertically polarized wave Ev shown in the diagram (B), the electric field vector of the horizontally polarized wave Eh is as shown in the diagram (C). , An electromagnetic wave having a vector component Ehx in the X-axis direction and a vector component -Ehy in the -Y-axis direction can be obtained.
The electric field vector of the horizontally polarized wave Eh, which is a combination of the two, is
The electric field vector of the vertically polarized wave Ev has a vector component Evx in the −X axis direction and a vector component −Evy in the −Y axis direction, as shown in FIG. The electric field vector of the vertically polarized wave Ev, which is a combination of the two, has a direction that bisects the −X axis and the −Y axis.

FIG. 2A is a front view of FIG.
As a means for outputting an electromagnetic wave that has passed through the composite phase circuit section including the phase shifter and the second phase shifter, the rectangular waveguide 6 is used as the −X axis and Y axis.
The horizontal polarization Eh shown in FIG. 4 (A) is bonded to the side surface of the circular waveguide 3 with the axis divided into two parts so that the phase does not change in the composite phase circuit section (phase difference is zero). , FIG. 4 (B)
The vertically polarized wave Ev shown in Fig. 4 is delayed by 180 degrees in the phase of the Y-axis component in the composite phase circuit section to form an electric field distribution as shown in Fig. 4D, so that the horizontally polarized wave is generated by the rectangular waveguide 6. Eh or vertically polarized wave Ev can be taken out, and the signal to be output by the rectangular waveguide 6 can be selected by operating the composite phase circuit section.

Next, the operation of the first phase shifter and the second phase shifter will be described. FIGS. 5A to 5D are explanatory views of the action of the phase shifter on linearly polarized waves, and FIGS. 5A and 5B show circular metal waveguides 4 and 5 of the first phase shifter. The position rotated with respect to the tube 2 is shown, and FIG.
The vertical direction is set, and the (B) diagram is set to the horizontal direction. (C) and (D) shows the position where the dielectric plate 8 of the second phaser is rotated with respect to the circular waveguide 2, and (C) shows the length of the end face of the dielectric plate 8. The direction is vertical, and the direction (D) is horizontal. This phase circuit has a horizontal polarization Eh shown in FIGS. 4 (A) and 4 (B).
When the electromagnetic wave of vertically polarized wave Ev is introduced, the phase velocities of the vector component in the X-axis direction and the vector component in the Y-axis direction are higher than Ehy in Eq.
The phase velocity of Evx is faster than that of Evx. In the case of (B), Ehy has a higher phase velocity than Ehx,
Has a faster phase velocity than Evx. In the case of (C), the phase velocity of Ehx is faster than that of Ehy,
The phase velocity of Evx is faster than that of Evx. In the case of (D), Ehy has a faster phase velocity than Ehx, and Evy
Has a faster phase velocity than Evx.

Therefore, if the shapes and lengths of the metal lumps (4 and 5) are selected and Ehy is set to be delayed by 90 degrees with respect to Ehx in the case of FIG. 90 degrees behind. In the case of the diagram (B), if Ehy is set to advance 90 degrees with respect to Ehx, Evy also advances 90 degrees with respect to Evx. Further, if the shape and length of the dielectric plate 8 are selected and Ehy is set to be delayed by 90 degrees with respect to Ehx in the case of (C), Evy is also delayed by 90 degrees with respect to Evx. In the case of the diagram (D), if Ehy is set to advance 90 degrees with respect to Ehx, Evy also advances 90 degrees with respect to Evx. In Figures (A) to (D), the center line of the tube axis of the rectangular waveguide 6 viewed from the side of the opening 1 of the circular waveguide 2 has a circular shape with the -X axis and the Y axis being bisected. The rectangular waveguide 6 is joined to the waveguide 3, and the signals output to the rectangular waveguide 6 are as follows.

When the first phase shifter is in the state shown in (A) and the second phase shifter is in the state shown in (C),

When the first phase shifter is in the state shown in (A) and the second phase shifter is in the state shown in (D),

In the case where the first phase shifter is in the state of (B) and the second phase shifter is in the state of (C),

When the first phase shifter is in the state shown in (B) and the second phase shifter is in the state shown in (D), Therefore, by rotating the first phase shifter and the second phase shifter and changing the arrangements of the metal blocks 4 and 5 and the dielectric plate 8, the horizontal polarization and the vertical polarization are switched, and the rectangular waveguide 6 Can be output from.

Next, the operation of receiving circularly polarized waves will be described below. 6 (A) to 6 (E) show the first case for circularly polarized waves.
It is explanatory drawing about the effect | action of a phase shifter and a 2nd phase shifter, circular polarization can be regarded as a synthesis | combination of two orthogonal linear polarizations, the amplitude of these two orthogonal linear polarizations is equal, Are polarized by 90 degrees, circular polarization is obtained. The circle shown in (A) shows the locus of the electric field vector of the circularly polarized wave, and the circularly polarized wave having the electric field vector E in the direction that bisects the X axis and the Y axis is introduced into the circular waveguide 2. Then, the circularly polarized wave can be represented as an electromagnetic wave having a linear polarization component Ex in the X-axis direction and a linear polarization component Ey in the Y-axis direction. X
When the phase of the linear polarized wave in the axial direction is delayed from that of the linear polarized wave in the Y-axis direction, the electric field vector E of the circular polarized wave rotates in the direction of the arrow b to become the left-hand circular polarized wave, and the linear polarized wave in the Y-axis direction. The polarization is
When the phase lags the linearly polarized wave in the X-axis direction, the electric field vector E of the circularly polarized wave rotates in the direction of the arrow a and becomes a right-handed circularly polarized wave.

(B) and (C) show the positions where the metal masses 4 and 5 of the first phaser are rotated with respect to the circular waveguide 2, and (A) shows the vertical direction. So that
The diagram (B) is arranged in the left-right direction. FIGS. 3D and 3E show the circular waveguide 2 with the dielectric plate 8 of the second phaser.
FIG. 3D shows a position rotated with respect to the center axis of the end surface of the dielectric plate 8 as viewed from the opening of the circular waveguide 2 in the longitudinal direction, which bisects the X axis and the Y axis. In FIG. 6E, the center line in the longitudinal direction of the end surface of the dielectric plate 8 as viewed from the opening of the circular waveguide 2 is such that the −X axis and the Y axis are bisected. When the dielectric plate 8 is set to the state of FIG. (D) or (E), two orthogonal linear polarization components (E of circular polarization)
x and Ey) are not in a propagation state parallel to the dielectric plate 8, no phase change occurs due to the dielectric plate 8, and therefore only the action of the first phaser needs to be considered. Is as follows.

The first phase shifter is shown in (B) and the second phase shifter is
In the case of the state of (D) or (E),

The first phase shifter is shown in (C), and the second phase shifter is
In the case of the state of (D) or (E),

Therefore, depending on whether the circularly polarized wave incident on the primary radiator is left-handed or right-handed, the first phase shifter is placed in the state shown in FIG. 2B or the state shown in FIG. For the left-hand circularly polarized wave, the first phase shifter is rotated to the state shown in (B), and for the right-handed circular polarized wave, the first phase shifter is rotated (C). With the state shown in the figure, circular polarization can be converted into linear polarization, and the signal converted into the linear polarization can be output from the rectangular waveguide 6. Therefore, a satellite broadcast radio wave using circular polarization and a communication satellite radio wave using linear polarization are received by the same primary radiator, a signal is extracted from the rectangular waveguide 6 and input to the converter. It becomes possible to receive satellite broadcasts or radio waves of communication satellites by changing the local transmission frequency and selecting a channel.

[0019]

FIG. 1 is a partially cutaway perspective view of a circularly polarized wave and linearly polarized wave primary radiator showing an embodiment of the present invention. As shown in FIG. A circular waveguide 2 having an opening 1 that can be well introduced, and a rotary type in which a first phaser (metal masses 4 and 5) is provided on the inner wall of a slider 14 of an ultrasonic motor having a slider 14 in the shape of a bar. The phase circuit section is arranged in the circular waveguide 2 so as to be close to each other so that the tube axes thereof are straight, and the terminal surface 9 capable of reflecting the introduced electromagnetic wave is provided, and the output means of the electromagnetic wave introduced to the side wall. A circular waveguide 3 provided with a rectangular waveguide 6 and a second phase shifter (dielectric plate 8) which is rotatable about the tube axis therein.
Are arranged close to each other in the phase circuit section such that the tube axes are linear. A 90-degree phaser composed of metal lumps 4 and 5 is used as the first phaser, and the metal is formed so that the opposing arcs of the upper and lower circular surfaces inside the slider 14 in the shape of a ring are flat. The lumps 4 and 5 are attached, and the lengths of the metal lumps 4 and 5 along the tube axis direction of the slider 14 are set so that the phase difference between two orthogonal polarization components of the TE11 mode of the electromagnetic wave propagating inside is 90 degrees. It is as long as possible. Only one of the metal ingots 4 and 5 may be used, but in this case, the length of the metal ingot along the tube axis direction of the slider 14 is increased in order to use a 90-degree phase shifter. There is a need.

Although the surfaces of the metal lumps 4 and 5 are substantially flat, the TE 11 of the electromagnetic wave propagating inside the slider 14 is used.
In order to generate a phase difference between two polarization components orthogonal to each other, it is sufficient to provide an inner diameter difference between the X-axis direction and the Y-axis direction, instead of making the surfaces of the metal ingots 4 and 5 flat. To
The surface may be raised so that the shape of the circular waveguide 2 seen from the opening 1 may be an arc shape, and the shape can be selected depending on the ease of processing. In the embodiment of FIG. 1, a 90-degree phaser composed of a dielectric plate 8 is used as the second phaser, and the dielectric plate 8 can be rotated about the tube axis of the circular waveguide 3. The length of the dielectric plate 8 along the tube axis direction of the circular waveguide 3 is made equal to the phase difference between two orthogonal polarization components of the TE11 mode of the electromagnetic wave propagating inside the circular waveguide 3. Is set to 90 degrees.

As a rotating mechanism of the dielectric plate 8, a drive unit 7 is provided outside the end surface 9 of the circular waveguide 3. For the drive unit 7, for example, a motor is used, and it is interlocked with the rotation of the motor. A rotating shaft 10 for rotating is provided at the center of the end surface of the dielectric plate 8 so that the dielectric plate 8 can be rotated around the tube axis of the circular waveguide 3. Although the end surface of the dielectric plate 8 has a substantially V-shape, it may have another shape as long as the phase circuit can be matched.
Further, instead of using the driving unit 7, the dielectric plate 8 is manually operated.
May be rotated. As a means for outputting the electromagnetic wave introduced into the circular waveguide 2, the rectangular waveguide 6 is provided on the side surface of the circular waveguide 3 facing the second phase shifter arranged on the end face 9 side of the circular waveguide 3. Are joined together.

FIG. 2A is a front view of FIG.
FIG. 1B is a side view of FIG. (A) As shown in the figure, the surfaces of the metal ingots 4 and 5 used as the first phaser are arranged so as to be parallel to the X axis and arranged in the arc portions of the circular waveguide 2 facing each other. The output rectangular waveguide 6 is arranged so that the tube axis of the rectangular waveguide 6 is at an angle that bisects the -X axis and the Y axis. Further, the dielectric plate 8 used as the second phase shifter is arranged so as to be parallel to the Y-axis in the longitudinal direction of the end face, and as shown in FIG. The first phase shifter and the second phase shifter are arranged in order toward the surface 9, and the electric field component in the Y-axis direction of the two orthogonal polarization components of the TE11 mode of the electromagnetic wave is delayed, as shown in Table 1. The phase difference can be 180 degrees,
Vertically polarized electromagnetic waves can be output from the rectangular waveguide 6.

FIG. 3 is an explanatory view showing the rotating mechanism of the phase circuit portion of the present invention, and an ultrasonic motor is used as the rotating mechanism. The metal lumps 4 and 5 used as a phase shifter are attached to the inner wall of the slider 13 in the shape of a ring, and the stator 13 in the shape of a partially cut ring is wound around the outside of the slider 14 in the shape of a ring. The outer box 11 in the shape of a bar as shown in FIG. The outer box 11 is provided with an opening so as to be located at one end of the stator 13 where the circular ring is cut, and the outer box 11 is similarly provided with an opening so as to be located at the other end. A child 16 is provided, and connection wires 15 and 17 are connected to the piezoelectric vibrators 12 and 16, respectively, and a high frequency voltage is applied to the piezoelectric vibrator 12 via the connection wire 15.
By vibrating the piezoelectric vibrator 12 and keeping the piezoelectric vibrator 12 and the stator 13 in a pressure contact state, the vibration of the piezoelectric vibrator 12 is transmitted to the stator 13, and the vibration wave is transmitted in the direction of the circular ring of the stator 13. I'm trying to go. The stator 13 and the slider 14 are the outer box 1 in the shape of a bar shown in FIG.
The slider 14 can be rotated by causing the vibration wave to be transmitted to the stator 13 due to the pressure contact state of the slider 1. A plurality of piezoelectric vibrators are provided around the stator 13, and the phases of the high-frequency voltage applied to the piezoelectric vibrators are changed to facilitate transmission of vibration waves in the direction of the circular ring of the stator 13 and rotate the slider 14. It may be easier to do. The vibration wave transmitted to the other end of the stator 13 is converted into an electric signal by the piezoelectric vibrator 16 and the electric signal transmitted by the connection wiring 17 is short-circuited to absorb the vibration, and the stator 13 is rotated in the direction of the circular ring. Only traveling waves are transmitted to.

FIG. 7 is an explanatory view of a linearly polarized primary radiator showing another embodiment of the present invention. FIG. 7A is a front view and FIG. .. The difference from the example shown in FIGS. 2A and 2B is that instead of using the rectangular waveguide 6 used to extract the output from the circular waveguide 3, a probe 19 is used to output the output. I took it out. The circular waveguide 3 and the rotary shaft 10 are respectively provided with end faces 9
The circular waveguide 21 and the rotary shaft 20 are extended to the side, and the fixture 19 is used to fix the probe 19 to the circular waveguide 21, and the probe 19 is, as shown in FIG.
The X-axis and the Y-axis are divided into two angles, and the insertion depth into the circular waveguide 21 is set so that the probe 19 can take out the maximum output. Further, the horizontal mounting position of the probe 19 with respect to the circular waveguide 21 is set to be substantially equal to the length of a quarter wavelength of the electromagnetic wave coupled from the terminal surface 9 to the probe 19, as shown in FIG. The probe 19 is attached by shifting the attachment position to the end face 9 side so that the dielectric plate 8 can rotate.

FIG. 8 shows another embodiment of the present invention,
FIG. 1 is a partially cutaway perspective view of a linearly polarized primary radiator.
In place of the metal ingots 4 and 5 used as the phase circuit in, the substantially rectangular metal plates 22 and 23 are used. The slider 14 having a circular shape is vertically attached to the center of the arcs of the upper and lower portions of the circular surface inside the slider 14 so that the short side direction of the metal plates 22 and 23 faces the tube axis of the slider 14 and the long side direction. Are arranged so as to be parallel to the tube axis of the slider 14, and the lengths of the metal plates 22 and 23 in the longitudinal direction along the tube axis direction of the slider 14 are set to be orthogonal to the TE11 mode of electromagnetic waves propagating inside the slider 14. The length is set so that the phase difference between the two polarized wave components can be 90 degrees. The shape of the end faces of the metal plates 22 and 23 in the short side direction is a shape in which a step is provided in the middle, but any other shape may be used as long as matching can be achieved as a phase shifter. Further, although only one of the metal plates 22 and 23 may be used, in this case, in order to set the phase difference to 90 degrees, it is necessary to increase the length of the metal plate in the long side direction. There is.

FIG. 9 is an explanatory view showing a connection state between the circular waveguide and the phase circuit section. For the circular waveguides 2 and 3, a rotary type constituted by a stator 13 and a slider 14 is provided. When the phase circuit parts are arranged close to each other so that the tube axes are linear and the boundary surface is discontinuous and the loss generated at the discontinuous part is large, the waveguides 2 and 3 of the connection part are arranged.
Is partially thickened, and two grooves formed by the end face of the connecting portion of the waveguide 2 and the end face of the connecting portion of the waveguide 3 and the end faces of the stator 13 and the slider 14 are ultrasonic waves, respectively. A choke structure is adopted so that the motor is terminated by the outer box 11, and the distance between the groove entrance and the end surface formed by the outer box 11 is made substantially equal to the half-wave length of the electromagnetic wave propagating inside. The loss generated at the discontinuous portion may be reduced.

[0027]

As described above, according to the present invention,
Rotating the first phase shifter and the second phase shifter of the rotating type with respect to the horizontal polarization and the vertical polarization, or the right-hand circular polarization and the left-hand circular polarization introduced into the circular waveguide. Therefore, by selecting the receiving side and outputting from the circular waveguide, a circular polarization and linear polarization shared primary radiator that can receive both circularly polarized wave and linearly polarized wave can be received. Can be provided.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a primary radiator for both circular polarization and linear polarization, showing an embodiment of the present invention.

2A is a front view of FIG. 1, and FIG. 2B is a side view of FIG.

FIG. 3 is an explanatory view showing a rotating mechanism of the ultrasonic motor of the present invention.

FIGS. 4A to 4D are exploded views of electric field vectors of horizontal polarization and vertical polarization at the input / output ends of the composite phase circuit unit.

5 (A) to (D) are explanatory views of the action of the phase shifter on linearly polarized waves.

6 (A) to 6 (E) are explanatory views of the action of the phase shifter on circularly polarized waves.

FIG. 7 is an explanatory view of a primary radiator for both circularly polarized waves and linearly polarized waves, showing another embodiment of the present invention, (A) is a front view, and (B) is a side view with a notched part. is there.

FIG. 8 is a partially cutaway perspective view of a primary radiator for both circular polarization and linear polarization, showing another embodiment of the present invention.

FIG. 9 is an explanatory diagram showing a connection state between a circular waveguide and a rotation mechanism section of an ultrasonic motor.

FIG. 10 is a partially cutaway perspective view of a circularly-polarized and linearly-polarized primary radiator according to a conventional example.

[Explanation of symbols]

 1 Opening 2 Circular Waveguide 3 Circular Waveguide 4 Metal Lump 5 Metal Lump 6 Rectangular Waveguide 7 Drive Part 8 Dielectric Plate 9 End Surface 10 Rotation Axis 11 Outer Box 12 Piezoelectric Vibrator 13 Stator 14 Slider 15 Connection Wiring 16 Piezoelectric vibrator 17 Connection wiring 18 Fixture 19 Probe 20 Rotation axis 21 Circular waveguide 22 Metal plate 23 Metal plate 24 Circular waveguide

Claims (4)

[Claims] 1. A first device provided with an opening through which an electromagnetic wave can be introduced.
The first phase shifter is provided on the inner wall of the circular waveguide and the slider of the ultrasonic motor having the slider in the shape of a bar, which are arranged in close proximity to each other so that the first circular waveguide and the tube axis are linear. Provided,
Rotational phase circuit part that can make the phase difference between two orthogonal polarization components of TE11 mode of the electromagnetic wave propagating inside is approximately 90 degrees, and the same phase circuit part and the tube axis should be straight. Is installed close to the terminal, has a terminating surface capable of reflecting the introduced electromagnetic wave, and has a rectangular waveguide or probe as an output means of the introduced electromagnetic wave on the side wall, and rotates about the tube axis inside. A second circular waveguide that is provided with a second phase shifter that enables the phase difference between two orthogonal polarization components of TE11 mode of an electromagnetic wave propagating inside the second phase shifter. A circularly-polarized and linearly-polarized primary radiator comprising a tube. 2. The first phase shifter comprising a metal block 9
2. The circularly polarized wave and the straight line according to claim 1, comprising a 0 degree phase shifter, wherein the metal mass is provided so that at least one circular arc of a circular surface inside the slider having a circular shape is a flat surface. Polarized primary radiator. 3. The first phaser comprises a 90-degree phaser composed of at least one substantially rectangular metal plate, which is vertically attached to the circular surface inside the slider having the shape of a bar, and the metal plate. 2. The primary radiation for both circularly polarized light and linearly polarized light according to claim 1, wherein the short side direction is oriented toward the tube axis of the slider, and the long side direction is arranged parallel to the tube axis of the slider. vessel. 4. The primary radiator for dual-purpose circular polarization and linear polarization according to claim 1, wherein the second phase shifter is a 90-degree phase shifter made of a dielectric plate.